how to check the each and every entry in a textbox with database

Question

1.00/5 (1 vote)

See more:

i want each entry in a textbox should check with table.is there any possible to use any tool in asp.net or ajax.
i was tried in code ,but its take some time to checkout.

i want to set the validation for this textbox.

Thanks,

Posted 20-Oct-13 18:48pm

King Fisher

Updated 20-Oct-13 18:57pm

v3

Add a Solution

Comments

JoCodes 21-Oct-13 1:14am

Can you post the code what you have tried so far ???

2 solutions

Solution 2

i did that,its take some time to load ...

Posted 20-Oct-13 19:52pm

King Fisher

Comments

JoCodes 21-Oct-13 2:03am

have you checked the link which uses ajax to do the same?

King Fisher 21-Oct-13 2:55am

protected void txtpassport_TextChanged(object sender, EventArgs e)
{
try
{

if (txtpassport.Text != "")
{
obj.passport = txtpassport.Text;
obj.Value = 44;
dr = obj.CheckDummy();
dr.Read();
if (dr.HasRows)
{
dr.Close();
msg.ShowAlertMessage("Passport Number Already Exists");
txtpassport.Text = "";
}
else
{
dr.Close();
}
}
}
catch (Exception ex)
{
Response.Write(ex.ToString());
}
}

with autopostback =true:

query is "Select *from tbl_table name where passport_no=@passport"

Like this i want to check Driving Licence Number,PAN card ,.. so its take long time

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

JoCodes · Accepted Answer · 2013-10-20T19:36:00

You can handle it inside the TextChanged event of the Textbox . Something like the below code .

<asp:TextBox ID="TextBox1" runat="server" OnTextChanged="TextBox1_TextChanged"></asp:TextBox>

Code Behind :

C#

protected void TextBox1_TextChanged(object sender, EventArgs e)
        {
           //Do your input checking with  a DB Call
        }

You can check this article as a reference if you want to check the same in Clientside/Ajax

http://www.aspsnippets.com/Articles/Check-Username-Availability-in-ASP.Net-using-AJAX-PageMethods.aspx[^]

Hope this helps...